Sipstation (gw1) and Secondary (gw2)

Hello, I have already sent a email about this and no response. I hace astenicc with Free PBX installed. When I downloaded the latest Sipstation plug in. Everything looks fine except the DID configuration section it does not show the option to select the Primary (gw1) and Secondary (gw2)trunks. This causes me not to be able to make outbound calls. Please urgently help me with this matter. What do I need to configure in order for these options to appear. They work fine in my trixbox and elaxtix installations.